Classification
Indicator
Description
Meaning
Digital Input
DIx
Digital input
indicators (dry
contact)
Steady on：Short to GND
Off：Open
Digital
Output
DOx
Digital input
indicators
Steady on：On
Off：Off
Ethernet
LINK
Network status
indicator
Steady on：Network connection enabled
Flashing：Transmit or receive data
Off：The network port is not plugged into the network
cable
SPD
10/100Mbps
indicator
Steady on：100M network connected
Off：Not connected to the 100M network
Downstream
Serial Port
RXD
RS485 data receive
indicator
Steady on：RS485 line fault, please check if the positive
and negative poles of 485 line are reversed
Flashing：RS485 receiving data
Off：RS485 no receiving data
TXD
RS485 data
transmit indicator
Flashing：RS485 transmitting data
Off：RS485 no transmitting data
Power
PWR
Power indicator
Steady on：Normal power supply
Off：No power or abnormal power supply, please
check if the voltage range is 9~27VDC
RUN
RUN
Running indicator
Steady on：Device exception
Flashing：Flashes every 1 second when the device is
ready
Off：Device exception
C2000-A2-SDD4040-BB3 User Manual
8 / 12
SinoCon Co., Ltd.
www.sinoconsys.com
